SilkSlip 100% Pure Mulberry Silk Pillowcase with Cotton Underside and Hidden Zipper for Hair and Skin, King Size, Light Blue 100% pure mulberry silk A 100% pure Mulberry silk pillowcase is an absolute must for anyone in search of a perfect night's sleep. Our pillowcase are made of high level mulberry silk but in a reasonable price! The upside is 100% Grade-A mulberry silk in 19momme 400 thread count. The underside is made with the cotton of 300 thread count in white color. Hidden zipper closure at the side to prevent Slipping. Our Grade-A mulberry silk pillowcases aid with the natural care to skin and hair, visibly reducing the signs of ageing. We have two size options Standard/Queen (20'' * 30'') and King(20'' * 36''). 9 color options. OEKO-TEX Certified (Standard 100) To Be Free Of Chemicals And Naturally Dyed With No Color Shading Or Fading. CARE INSTRUCTIONS: Machine-washable in lukewarm water (30C) on most gentle cycle available. Hang to Dry. Cool Iron. Do Not Bleach. Can Also Be Dry Cleaned.